CT SB00257

Defines "high volume third-party seller" as any online marketplace seller with 200+ discrete sales or $5,000+ in gross revenues within any continuous 12-month period during the previous 24 months, effective January 1, 2023.

Requires high volume third-party sellers to provide online marketplaces within 10 days of qualification with bank account information, government-issued identification or tax documents, business/taxpayer identification numbers, and current contact information.

Mandates online marketplaces verify seller information within 10 days and notify sellers annually to update their information, with sellers required to certify changes or no changes within 10 days or face sales suspension.

Requires sellers with $20,000+ annual gross revenues to publicly disclose their full name, physical address, and contact information to consumers in order confirmations and transaction history, with limited exceptions for residential addresses and nonresponsive sellers.

Establishes that violations by online marketplaces constitute unfair trade practices and prohibits local municipalities from imposing additional collection, verification, or disclosure requirements on sellers.